package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.AddressBookService;
import com.sky.service.OrderSerive;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class OrderSeriveImpl implements OrderSerive {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    //用户下单
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        //查询当前用户的购物车数据
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null || shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);

        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }

        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);

        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    //历史订单查询
    public PageResult pageQueryUser(int page, int pageSize, Integer status) {

        PageHelper.startPage(page,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        Page<Orders> page1=orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list=new ArrayList<>();
        if(page1!=null&&page1.getTotal()>0){
            for (Orders orders : page1) {
                Long ordersId = orders.getId();
                List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(ordersId);
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                list.add(orderVO);
            }
        }

        return new PageResult(page1.getTotal(),list);
    }

    //查询订单详情
    public OrderVO details(Long id) {
        Orders orders=orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 用户取消订单
     *
     * @param id
     */
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款


        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    //再来一单
    public void repetition(Long id) {
        Long userId = BaseContext.getCurrentId();
        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(id);

        List<ShoppingCart> shoppingCartList=orderDetailList.stream().map(x->{
            ShoppingCart shoppingCart=new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());

        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    //用户端订单搜索
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {

        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList=getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList=new ArrayList<>();

        List<Orders> ordersList=page.getResult();
        if(!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                OrderVO orderVO=new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes=getOrderDishesStr(orders);

                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders) {

        List<OrderDetail> orderDetailList=orderDetailMapper.getByOrderId(orders.getId());
        List<String> orderDishList=orderDetailList.stream().map(x->{
            String orderDish =x.getName()+"*"+x.getNumber()+";";
            return orderDish;
        }).collect(Collectors.toList());
        return String.join("",orderDishList);
    }


    //各个状态订单数量统计
    public OrderStatisticsVO statistics() {

        Integer toBeConfirmed=orderMapper.contStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed=orderMapper.contStatus(Orders.CONFIRMED);
        Integer deliveryInProgress=orderMapper.contStatus(Orders.DELIVERY_IN_PROGRESS);

        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    //接单
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {

        Orders orders=Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    //拒单
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {

        Orders orderMapperById = orderMapper.getById(ordersRejectionDTO.getId());

        if(orderMapperById==null || !orderMapperById.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(orderMapperById.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    //取消订单
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception{

        Orders ordersDB=orderMapper.getById(ordersCancelDTO.getId());

        Orders orders = new Orders();
        orders.setCancelTime(LocalDateTime.now());
        orders.setStatus(Orders.CANCELLED);
        orders.setId(ordersCancelDTO.getId());
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orderMapper.update(orders);

    }

    //派送订单
    public void delivery(Long id) {

        Orders ordersDB=orderMapper.getById(id);
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    //完成订单
    public void complete(Long id) {
        Orders ordersDB=orderMapper.getById(id);
        if(ordersDB==null||!ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }


}
